Steam-boiler furnace and door therefor.



No. 650.855. Patnted lune 5,1900.

Y J. 0. MORRIS.

STEAM BUILE'B IA-'URNMIEl AND DOOR THEREFUR.

(A'pplication filed Oct. 11, 1899.)

(No Nadel.)

' W/7'NESSES t /N VENTOH.'

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7 UNiTE STATES ATENT OFFICE.

JOHN ODN MORRIS, OFIHOHMOND,y VIRGINIA, ASSIGNOR OF TWO-FIFTHS TO EDWIN T. VADE, OF SAME PLACE.

STEAM-'BOILER FURNACE AND DOOR THREFOR.

SPECIFICATION forming part of Letters Patent No. 650,855, dated June 5, 1900. Appnann n'eaoaober 11,1899. senti No. 733.251. (No model.)

To all whom, t may coizcernf Be it known that I, J oHN OBEN MORRIS, acitizen of the United States, residing at Richmond, in the county of Henrico and State of Virginia, have invented new and useful Improvements in Steam-Boiler Furnaces and Doors Therefor, of which the following is a specification.

My invention relates to steam-boiler furro naces and doors therefor; and the object of the same is to provide for the admission of atmosphericair above the fuel-bed and to regulate the force of the draft by a damper mechanism whichl will insure the complete i5 burning of the products of combustion.

To this end the invention consists in the novel construction and combination of parts hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is zo a longitudinal section of a steam-boiler furnace constructed in accordance with my invention. Fig. 2 is a plan View of the furnacedoor. Fig. 3 is a plan view of the damperplate. Fig. 4 is a similar view of the damper- 2 5 frame or spider. Fig. 5 is a vertical section through the furnace-door, damper-plate, and damper.

Like numerals of reference indicate like parts in the various views of the drawings.

Walls of the furnace; 2, the bridge-wall; 3, the grate; 4, the fire-opening, and 5 asteamboiler of the horizontal type.

It will be understood, of course, that my improvements may be used with an upright or vertical boiler.-

The bridge-wall 2 is provided with an opening 6 for the passage of the products of combustion, and located in the combustion-cham- 4o bers 7, in rear of the bridge-wall 2, are upper and lower arches 8, which retard the products of combustion in order that they shall be completely consumed.

The numeral 9 designates the ash-pit, and

10 the door thereof.

The furnace-door 11 consists of a doorframe 12, having a central opening 13, which may be rectangular, as shown in the drawings, but not necessarily so. At the corners 5o of the opening 13 bolt-holes 14 are formed, and the damper-plate 15 is secured to the The reference-numeral 1 designates the.

door-frame by shouldered bolts 16, passing through the bolt-holes 14 and registered boltholes 17 in the corners of the damper-plate 15. By means of the shouldered bolts 15 the 55 damperplate is held at some distance in front of the opening 13 in the door-frame, and by this construction air may enter at all points around the damper-plate, and provision is also made for central draft by means 6'0 of the usual slide-dam per 18. Acentral bolthole 19 is formed in the damper-plate, and a bolt 20, passing through this hole, is connected at its threaded end to a draft-regulator or spider 21. This regulator consists. of a central boss 22, formed on the spiders 23, said spiders having formed on their outer extremities a rectangular flange 24, which [its the damper-plate 15. A spiral spring 2 surrounds the bolt 19 between the plate 15 7o and the regulator 21, and this spring has a tendency to hold the regulator outward away from the plate. A nut 26 on the end of the bolt 20 serves to adjust the lflange 24 of the regulator toward and from the furnace-door to regulate the draft by giving more or less space around the plate 15.

From the foregoing it will be seen that air may be admitted above the fuel-bed either by the slide-dam per or by ythe use of the regula- 8e tor, which gives a draft of greater area and force and can be controlled to the desired degree to consume all the products of combustion and to give the required heat for different conditions and qualities of fuel.

Having thus fully described my invention, what I claim is- 1. The combination with a steam-boiler furnace, of the door-frame having a central opening therein, a plate secured in front of 9o said opening, leaving a space between said door-frame and plate, and a regulator adjustable toward and from the door-frame around said plate to regulate the draft, substantially as described.

2. The combination with a steam-boiler furnace, of a draft-regulator consistingof a door having a central opening, a plate secured in front of said opening, at a distance therefrom, said plate being provided with a roo slide-dam per, and a draft-regulator surrounding said plate and adjustable toward and ing a flange surrounding said plate, a bolt I5 passing through said plate and regulator, a spring surrounding said bolt, and means for adjusting the draft-opening between the doorfraine and the draft-plate, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

' JOHN ODEN MORRIS.

Witnesses:

EMMA M. GILLETT, E. 1. IEUNYEA. 

